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Python: Create non-repeated combinations of Cartesian product of three list

Python Itertools: Exercise-30 with Solution

Write a Python program to create non-repeated combinations of Cartesian product of four given list of numbers.

Sample Solution:

Python Code:

import itertools as it
mums1 = [1, 2, 3, 4]
mums2 = [5, 6, 7, 8]
mums3 = [9, 10, 11, 12]
mums4 = [13, 14, 15, 16]
print("Original lists:")
print(mums1)
print(mums2)
print(mums3)
print(mums4)
print("\nSum of the specified range:")
for i in it.product([tuple(mums1)], it.permutations(mums2), it.permutations(mums3), it.permutations(mums4)):
    print(i)

Sample Output:

Original lists:
[1, 2, 3, 4]
[5, 6, 7, 8]
[9, 10, 11, 12]
[13, 14, 15, 16]

Sum of the specified range:
((1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12), (13, 14, 15, 16))
((1, 2, 3, 4), (5, 6, 7, 8), (9, 10, 11, 12), (13, 14, 16, 15))

Python Code Editor:


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Previous: Write a Python program to interleave multiple lists of the same length. Use itertools module.
Next: Write a Python program to count the frequency of consecutive duplicate elements in a given list of numbers. Use itertools module.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m